The Portugieser Constant-Force Tourbillon Edition “150 Years” stands out as one of the technical highlights in the jubilee collection. This model has a platinum case, a blue dial with a lacquered finish, and rhodium-plated hands. It is available in a limited edition of just 15 watches. For the first time, the new IWC-manufactured hand-wound 94805 calibre, with a power reserve of 96 hours, combines a constant-force tourbillon with a single moon phase display. This moon phase display needs to be adjusted by only one day every 577.5 years. The patented constant-force mechanism disengages the escapement from the direct flow of power from the wheel train, and transmits completely even impulses to the escape wheel. In conjunction with the tourbillon, which compensates for the negative influences of gravity on the watch’s oscillating system, this achieves a very high level of precision.
Platinum case Diameter 46.0 mm Height 13.4 mm See-through sapphire glass back Water resistance 3 bar
94805 Calibre IWC-manufactured movement Manual-winding 96 hours Power Reserve Frequency 18000.0 vph (2.5 hz) 341 Components 41 Jewels Côtes de Genève
Tourbillon with integrated constant-force mechanism Moon phase display Power reserve display Sapphire glass, arched-edge, antireflective coating on both sides Limited to 15 pieces
Black alligator leather strap by Santoni Strap width 22 mm